package com.sky.service.user.Impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.mapper.admin.DishMapper;
import com.sky.mapper.admin.SetmealMapper;
import com.sky.mapper.user.ShoppingCartMapper;
import com.sky.pojo.Dish;
import com.sky.pojo.Setmeal;
import com.sky.pojo.ShoppingCart;
import com.sky.service.user.ShoppingCartService;
import com.sky.vo.DishVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import java.time.LocalDateTime;
import java.util.Collections;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    public void add(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);

        //只能查询自己购物车的数据
        shoppingCart.setUserId(BaseContext.getCurrentId());
        shoppingCart.setCreateTime(LocalDateTime.now());
        //先查询购物车是否存在菜品或套餐
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (!CollectionUtils.isEmpty(shoppingCartList)){
            //如果已经存在，就更新数量，数量加1
            shoppingCart = shoppingCartList.get(0);
            shoppingCart.setNumber(shoppingCart.getNumber() + 1);
            shoppingCartMapper.updateNumberById(shoppingCart);
        }else {
            shoppingCart.setNumber(1);
        //判断当前添加到购物车的是菜品还是套餐
        Long dishId = shoppingCartDTO.getDishId();
        if (dishId != null) {
            //添加到购物车的是菜品
            DishVO dish = dishMapper.getDishById(dishId);
            shoppingCart.setName(dish.getName());
            shoppingCart.setImage(dish.getImage());
            shoppingCart.setAmount(dish.getPrice());
        } else {
            //添加到购物车的是套餐
            SetmealVO setmeal = setmealMapper.getSetmealById(shoppingCartDTO.getSetmealId());
            shoppingCart.setName(setmeal.getName());
            shoppingCart.setImage(setmeal.getImage());
            shoppingCart.setAmount(setmeal.getPrice());
        }
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    @Override
    public List<ShoppingCart> showShoppingCart() {
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.selectByUserId(BaseContext.getCurrentId());

        return shoppingCartList;
    }

    /**
     * 清空购物车商品
     */
    @Override
    public void cleanShoppingCart() {
        shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());
    }
}
